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Finding the Fourth Proportional to 1,925.15, 2,886.10 and 828.68

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Solution

The fourth proportional to 1,925.15, 2,886.10 and 828.68 is: 1,242.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,925.15 : 2,886.10 = 828.68 : x
  2. Step 2: Convert to fraction form
    1,925.15/2,886.10 = 828.68/x
  3. Step 3: Cross multiply
    1,925.15x = 2,886.10 × 828.68
  4. Step 4: Simplify right side
    1,925.15x = 2,391,636.85
  5. Step 5: Solve for x
    x = 2,391,636.85/1,925.15
  6. Step 6: Final answer
    x = 1,242.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.